Oki C910 User manual

Oki Data CONFIDENTIAL
Model X
Maintenance Manual
032007A

Copyright © 2008 by Oki Data. All Rights Reserved
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Data copyright.
Oki Data has taken care to insure that the information which follows is complete,
accurate and up-to-date. However, Oki Data assumes no responsibility for errors or
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All publications may include technical inaccuracies or typographical errors. We reserve
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The most up-to-date drivers and manuals are available from the web site:
http://www.okiprintingsolutions.com
Oki Data CONFIDENTIAL

44043511TH Rev.2 2 /
Oki Data CONFIDENTIAL
Document Revision History
Rev.No. Date
Corrected items Person in
charge
No. Page Description of change
1 2009-03-27 Issue PDE13 M. Yabuki
2 2010-05-12 Add C930 PMD Y. Toyama

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Oki Data CONFIDENTIAL
Preface
This manual describes the procedures of the maintenance of the C910/C930 printer.
The document is produced for maintenance personnel use.
Note! • The descriptions in this manual are subject to change without prior notice.
• In preparing the document, efforts have been made to ensure that the information in it is ac-
curate.
• The parts used for the printers are sensitive and, if handled improperly, may be damaged. It
is strongly recommended that the products are maintained by maintenance men registered
with Oki Data.
• Errors may be crept into the document. Oki Data assumes no responsibility for any damage
resulting from, or claimed to be the results of, those repairs, adjustments or modifications to
the printers which are made by users using the manual.
• Be sure to eliminate static electricity before starting work.

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Oki Data CONFIDENTIAL
Do not touch the safety switch of the internal parts of the printer. Electric shock
may occur due to the occurrence of high pressure. The rotation of the gear may
also cause injury.
Do not use an extremely flammable spray around the printer. Fire may occur
because of parts with high temperature.
Please let our staff in Customer Center know after unplugging mains connector
when the cover gets extremely hot, is smoking, emits questionable odor, or is
making strange noise. Fire may occur.
Please let our staffs in Customer Center know after unplugging mains connector
when liquid such as water goes into the printer. Fire may occur.
Please take a foreign object away after unplugging when you drop foreign objects
such as clips into the printer. That situation may case electric shock, fire, and/or
injury.
Do not conduct an operation or an analysis other than specified in user's manual.
That situation may case electric shock, fire, and/or injury.
Please let our staffs in Customer Center know after unplugging mains connector
when the printer has fallen down or damaged. That situation may case electric
shock, fire, and injury.
Do not connect the power cord, the printer cable, or the ground wire other than
instructed in user's manual. Fire can be induced if misused.
Do not insert objects at the vent hole. Do not operate the printer with the rear
cover opened. Electric shock, fire, and/or injuries may occur.
Do not place a cup with liquid on the printer. Electric shock, fire, and/or injuries
may occur.
In order to use the product with safety
In order to use the product with safety, make sure to read the user's manual (this manual) before
using the product.
General Caution

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Oki Data CONFIDENTIAL
Risk of explosion if battery is replaced by an incorrect type.
Battery of the printer need not to be replaced. Do not touch the battery.
Replace the whole board to replace the CU main board.
In the case of replacing batteries at board repairs, replace with the specified type
ones. Installation of another type batteries may result in explosion.
Caution for used batteries are as follows; do not recharge, force open, heat or
dispose of in fire.
When open the printer cover, do not touch the fuser unit. You may get burned.
Do not throw toner cartridges, or image drum cartridges into fire. You may get
burned by dust explosion.
We do not guarantee operations when UPS (Uninterruptible Power Supply) or
inverter is used.
Do not use UPS or inverter.
It may cause fire.
Do not go near an ejection area while the power is on and in printing. You may get
injured.

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Oki Data CONFIDENTIAL
Contents
1. CONFIGURATION ................................................................................................9
1.1 System Configuration............................................................................................................9
1.2 Printer Composition.............................................................................................................10
1.3 Optional Composition.......................................................................................................... 11
1.4 Specifications......................................................................................................................13
1.5 Interface Specifications ......................................................................................................15
1.5.1 USB Interface Specifications ................................................................................15
1.5.2 Network Interface Specifications ...........................................................................16
1.5.3 Parallel Interface Specifications ...........................................................................17
2. DESCRIPTIONS OF OPERATIONS ...................................................................20
2.1 Main Control PCB ...............................................................................................................21
2.2 Engine Control PCB ...........................................................................................................25
2.3 Power Unit...........................................................................................................................27
2.4 Mechanical process ...........................................................................................................28
2.4.1 Electrophotographic Processing Mechanism ........................................................29
2.4.2 Paper Processing Mechanism...............................................................................33
2.5 Sensor ................................................................................................................................42
2.5.1 Paper-Related Sensor ...........................................................................................42
2.5.2 Other Sensors........................................................................................................43
2.6 Color Drift Correction .........................................................................................................44
2.7 Image Transfer Control According to Environmental Change
(Room Temperature and Relative Humidity).......................................................................44
2.8 Paper Jam Detector ............................................................................................................45
2.9 Cover Open .........................................................................................................................46
2.10 Toner Low Detection ...........................................................................................................47
2.11 Paper Size Detection...........................................................................................................50
2.12 Power ON Process..............................................................................................................51
2.12.1 Self-Diagnostic Test...............................................................................................51
2.13 Color Drift Detection............................................................................................................52
2.14 Reading Version of Routine Replacement Units.................................................................53
2.15 Life Counter of Replaceable Units ......................................................................................53
2.16 Toner Usage Level Detection ..............................................................................................54
3. PRINTER INSTALLATION..................................................................................55
3.1 Precautions and Prohibition ................................................................................................55
3.2 Printer Unpacking Procedure ..............................................................................................57
3.3 Printer Installation Instructions............................................................................................58
3.4 Packed Units and Attachments ...........................................................................................59
3.5 Assembly Procedure ...........................................................................................................60
3.5.1 Printer Main Body ..................................................................................................60
3.5.2 Power Cable Connection.......................................................................................67
3.5.3 Installation of Optional Components .....................................................................71
3.5.4 Checking of Optional-Component Recognition .....................................................84
3.6 MenuMap Printing ...............................................................................................................86
3.7 How to Connect...................................................................................................................87
3.8 Checking of User Paper ......................................................................................................90

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Oki Data CONFIDENTIAL
4. PARTS REPLACEMENT ....................................................................................91
4.1 Precautions When Replacing Parts ....................................................................................91
4.2 Parts Layout ........................................................................................................................93
4.3 Parts Replacement Method...............................................................................................109
4.3.1 Cover-Rear, Cover-Side (R), and Cover-Side (R) Rear....................................... 110
4.3.2 Cover-Side (L) and Cover Assy-Front.................................................................. 111
4.3.3 Stacker Assy-FU.................................................................................................. 112
4.3.4 Cover Assy-OP Panel, Cover-Guard (R), Cover-Guard (Front) and
Cover-Guard (L)................................................................................................... 113
4.3.5 OP PCB ............................................................................................................... 114
4.3.6 Cover Assy-Top.................................................................................................... 115
4.3.7 FAN-PCB-Assy, CU-Board-Assy and S2X/S2V-PU-Board ................................. 116
4.3.8 Job-Offset-Assy 723 and Basket-Assy................................................................ 117
4.3.9 Plate Top Assy ..................................................................................................... 119
4.3.10 Eject-Assy............................................................................................................120
4.3.11 Motor-Pulse-Belt and Sensor-Resist-Assy ..........................................................121
4.3.12 FDR Unit-MPT .....................................................................................................122
4.3.13 FDR Unit-Resist...................................................................................................123
4.3.14 Duct Assy.............................................................................................................124
4.3.15 HV-Assy ...............................................................................................................125
4.3.16 Power Unit ...........................................................................................................126
4.3.17 Low Voltage Power Source Assy and Motor-FAN................................................127
4.3.18 Belt-Assy..............................................................................................................128
4.3.19 Fuser Unit-LBT.....................................................................................................129
4.3.20 Unit-Duplex ..........................................................................................................130
4.3.21 Paper Feed Roller................................................................................................131
4.3.22 MPT Feed Roller..................................................................................................132
5. ADJUSTMENT..................................................................................................133
5.0 System Maintenance Menu ..............................................................................................133
5.0.1 ID Check Pattern Print (“TEST PRINT MENU” Item) ..........................................135
5.0.2 Maintenance Utility ..............................................................................................135
5.1 Maintenance Menu and Its Function.................................................................................138
5.1.1 Maintenance Menu .............................................................................................138
5.1.2 Engine Maintenance Mode .................................................................................138
5.1.2.1 Operation Panel ..................................................................................................138
5.1.3 Various Printing Methods with a Stand-Alone Printer Coming with a Controller .166
5.2 Adjustment After Replacing Parts .....................................................................................167
5.2.1 Precautions when Replacing the Engine Control PCB........................................167
5.2.2 Precautions Upon EEPROM Replacement .........................................................167
5.2.3 CU PCB of 1200 dpi Printer and Replacement of Mounted Components ...........169
5.2.4 Precautions in Key Chip Replacement (1200dpi printer).....................................170
5.2.5 Precautions in EEPROM Replacement (1200 dpi printer)................................... 171
5.2.6 Precautions in HDD Replacement (1200 dpi printer)...........................................172
5.2.7 Product Code of Maintenance HDD (1200 dpi printer)........................................ 173
5.2.8 Setup of EEPROM after replacement of TBX PCB................................................. 174
5.2.9 Setup of destination ................................................................................................ 175
5.2.10 Versions of firmware for maintenance purpose (600 dpi printers) ........................ 176

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Oki Data CONFIDENTIAL
5.3 Density Correction ............................................................................................................177
5.4 Paper Thickness Detection/Sensitivity Correction............................................................178
6. ROUTINE REPLACEMENT ..............................................................................180
6.1 Routine Replacement of Consumable Parts.....................................................................180
6.2 Cleaning ...........................................................................................................................180
6.3 LED Lens Array Cleaning .................................................................................................180
6.4 Pickup Roller Cleaning ..................................................................................................... 181
6.5 Cleaning Feed Roller.........................................................................................................182
7. MALFUNCTION REPAIR PROCEDURE..........................................................188
7.1 Precautions Before Repairs ..............................................................................................188
7.2 Items to Check Before Remedying Abnormal Image .......................................................188
7.3 Precautions Before Remedying Abnormal Image.............................................................188
7.4 Troubleshooting Preparations ..........................................................................................188
7.5 Troubleshooting.................................................................................................................188
7.5.1 LCD Message List ..............................................................................................189
7.5.2 Preparing for Troubleshooting .............................................................................198
7.5.3 Troubleshooting With Abnormal Image ...............................................................212
7.6 Check Fuse ......................................................................................................................227
8. CONNECTION DIAGRAM ................................................................................228
8.1 Check Resistance Value ...................................................................................................228
8.2 Diagram of Part Layout of Various PCB............................................................................235
9. MESSAGE LIST................................................................................................242
9.1 Message Chart of C910/C930 ..........................................................................................242
9.2 Illustration appears on the operating panel.......................................................................251
9.3 F/W Revision (C910).........................................................................................................254
9.3.1 F/W Rev. table .....................................................................................................254
9.3.2 Check abd version display...................................................................................254
APPENDIX-A C910/C930 LCD/LED DISPLAY......................................................255

Oki Data CONFIDENTIAL
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1. Configuration
1.1 System Configuration
Figure 1-1 illustrates the System Configuration of this printer.
Figure 1-1
Job
Offset
M M
M
M
M
M
M
LED Head
Connection PCB
Engine Controller
Low Voltage
Power Unit
Fuser Unit
2nd/3rd Tray
Large-Volume
Paper Tray
Double-Side
Printer Unit
Belt Unit
<Sensor, Switch and Thermistor>
Paper Conveyor Sensor Paper Size Detector Fuser Temperature Detector Ambient Temperature/Humidity Detector Remaining Toner Level Detector ID, Belt, Fuser Check RFID, slack detection, & phase detection
C-ID UnitM-ID UnitY-ID Unit K-ID Unit
C ID
M
Fuser M ID
Y ID
K ID
Belt
MT/
Resist
Hopping
Geared
Motor
Lift up
DC motor Pulse motor
M
Disposal
Toner
Toner
Supply x2
Operation Panel
<High Performance Sensor>
Heavy Paper Sensor Density Sensor Color Drift Sensor
1200dpi PCB (AS3)
USB
DC FAN DC FAN
Ethernet
Control
Area
600dpi PCB (TBX)
or
USB
HDD HDD
Ethernet
DDR SDRAM DIMM ×2
DDR SDRAM DIMM ×2
Centro
High Voltage
Power Unit
M

Oki Data CONFIDENTIAL
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Figure 1-2
1.2 Printer Composition
The internal part of the printer consists of the following parts.
• Digital Photo Processor
• Paper Travel Path
• Control Unit (CU and PU)
• Operation Panel
• Power Source (High Voltage Area/Low Voltage Area)
Figure 1-2 illustrates the printer composition.

Oki Data CONFIDENTIAL
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1.3 Optional Composition
This printer comes with the following options.
(1) 2ndTray/3rdTray
(2) Double-Side Printer Unit
(3) Large-Volume Paper Tray
(4) Additional Memory: 256, 512MB
(5) Internal Harddisk

Oki Data CONFIDENTIAL
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(6) Finisher Unit
• 5 Tray (except for China)

Oki Data CONFIDENTIAL
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1.4 Specifications
(1) Dimensions (H W D): 471 mm 654 mm 625 mm
(2) Weight: 76.1 kg
(3) Paper
Paper Type: Regular paper and transparency
Paper Size:
Post Card, Legal 13”or 14”, Executive, A4, A5, B5,
A6, A3, A3 Nobi, B4, Letter, Tabloid
(However, Post Card:1stTray and Multi-purpose-Tray
only)
Continuous Paper Feed: 1st Tray : 64 to 216 g/m2
Multi-purpose-Tray : 64 to 300 g/m2
(4) Print Speed
Color: 31 ppm (OHP: 10 ppm)
Monochrome: 36 ppm (OHP: 15 ppm)
Post Card, Label, Heavy Paper: 15 ppm
(5) Resolution: 1200 600/16 bit gray scale (C930)
600 600/32 bit gray scale (C910)
(6) Input Power: 110~127VAC ±10%
220~240VAC ±10%
(7) Power Consumption a) 120V
Peak : 1500W
Normal : 750W (Reference)
Idle : Ave. 200W (Reference)
Power Save mode : 33W
b) 230V
Peak : 1500W
Normal : 750W (Reference)
Idle : Ave. 200W (Reference)
Power Save mode : 34W
(8) Frequency: 50/60Hz ± 1Hz
(9) Noise
During Operations: 54 dB (without optional unit)
Standby Time: 42 dB
Power Save: 28 dB
(10) Life of Consumables
Toner Cartridge: 5,000 page (A4 5% Duty) (Y, M, C, K each)
Large-Volume Toner Cartridge: 15,000 page (A4 5% Duty) (Y, M, C, K each)
Imaging Drum: 20,000 page (A4 5% Duty, Continuous Printing)
(for 3P/J) (Y, M, C, K each)

Oki Data CONFIDENTIAL
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(11) Routine Replacement of Consumable Parts
Fuser Unit Assy: Every 100,000 pages
Transfer Belt Unit Assy: 100,000 page equivalent (for 3P/J)
Feed Roller Set: Around 120,000 pages
MPT Feed Roller Set: Around 120,000 pages
Waste Toner Box: 20,000 pages or equivalent (3P/J)
(12) Temperature and Relative Humidity
Temperature
Temperature Conditions
Relative Humidity
Relative Humidity Conditions
Temperature
(°F)
Temperature
(°C) Remarks
Operating 50 to 89.6 10 to 32 17 to 27°C (Temperature guaranteeing
full-color print quality)
Not Operating 32 to 109.4 0 to 43 Power OFF
Storage (1 Year Max) -14 to 109.4 -10 to 43 Drum and Toner: Yes
Transport (1 month Max) -20 to 122
-22 to 118
-29 to 50
-30 to 48 Drum and Toner: Yes
Relative Humidity
(%)
Maximum Web Bulb
Temperature
(°C)
Remarks
Operating 20 to 80 25 50-70% (Temperature guaranteeing
full-color print quality)
Not Operating 10 to 90 26.8 Power OFF
Storage 10 to 90 35
Transport 10 to 90 40
(13) Printer Life: every 1,000,000 page (for A4 paper) or 5 years

Oki Data CONFIDENTIAL
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Cable: B Plug (Male)
(2) Cable
Cable Length: <2m USB 2.0 cable recommended.
(Use a cable with shielded wire)
1.5.1.3 USB Interface Signal
1.5 Interface Specifications
1.5.1 USB Interface Specifications
1.5.1.1 USB Interface Overview
(1) Basic Specifications
USB 2.0 Compliant
(2) Transfer Mode
Full Speed (max. 12Mbps+0.25%)
High Speed (max. 480Mbps+0.05%)
(3) Power Control
Self-Power Device
1.5.1.2 USB Interface Connector and Cable
(1) Connector
Printer-Side B Receptacle (Female)
UP Stream Port
UBB-4R-D14T-1 (JST Mfg. Co., Ltd.) equivalent product
Connector Pin Layout
2
3 4
1
R1 Function
1 Vbus Power Source (+5V) (Red)
2 D- Data Transfer (White)
3 D+ Data Transfer (Green)
4 GND Signal GND (Black)
Shell Shield

Oki Data CONFIDENTIAL
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1.5.2 Network Interface Specifications
1.5.2.1 Network Interface
Network protocols: TCP/IP, NetWare, Ether Talk, & NetBEUI
1.5.2.2 Network Interface Connector and Cable
(1) Connector
1000 Base-T/100 Base-TX/10 Base-T
(automatically switched and not available simultaneously)
Connector pin layout
1 8
(2) Cable
Unshielded twisted pair cable with RJ-45 connector (Category 5e, Category 6 is recom-
mended.)

Oki Data CONFIDENTIAL
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1.5.3 Parallel Interface Specifications
1.5.3.1 Parallel Interface Overview
1.5.3.2 Parallel Interface Connector and Cable
(1) Connector
Printer: 36pConnector (Female)
57LE-40360-12 (D56) (DDK Ltd.) equivalent product
Cable: 36pConnector (Male)
57FE-30360-20N (D8) (DDK Ltd.) equivalent product
118
1936
Pin arrangement from interface cable side
(2) Cable
Use a cable shorter than 1.8m.
(Use a cable with a shielded twisted-pair wire for to prevent noise interference.)
1.5.3.3 Parallel Interface Level
Low Level : 0.0V to +0.8V
High Level : +2.4V to +5.0V
Item Details
Corresponding mode Comatible mode, nibble mode, ECP mode
Data bit length Compatible: 8, Nibble: 4, ECP: 9 bit

Oki Data CONFIDENTIAL
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1.5.3.4 Timing Chart
Compatible Mode
a) Data Reception Timing
b) Online/Online SW for Offline Switching Timing
c) Offline/Online SW for Online Switching Timing
d) nlnit Timing (Default Invalid)
PARALLEL DATA
(DATA BITs 1 to 8)
nStrobe
nAck
BUSY
0.5 µs min. 0.5 µs min.
0.5 µs min.
0.5 µs max.
0.5 µs min.
0 min. 0 min.
0.5 µs to 3 µs
0 min.
ON-LINE SW
BUSY
100 ms max.
SELECT
SELECT
ACKNOWLEDGE
ON-LINE SW
BUSY
INPUT. PRIME
SELECT
ACKNOWLEDGE
BUSY
50 µs min.
* It is based on a menu setup.
5µs max.

Oki Data CONFIDENTIAL
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1.5.3.5 Parallel Interface Signal
The name of the interface signal and pin number is indicated in Table 1-1.
Table 1-1 Signals
Note! Nibble mode signal names are indicated in the ( ).
Only indicates the Compatible Mode functions.
This printer supports the IEEE 1284-1994 Nibble Mode standardized by the Institute of
Electric and Electronic Engineers (IEEE). Note that use of PCs and cables that do not
comply with this standard may result in unforeseeable operations.
Pin No. Signal Name Direction Function
1 nStrobe
(HostClk)
TO PRINTER Pulse to read data.
Data is read with the latter wire.
2 DATA 1 TO PRINTER 8bit parallel data.
High Level: "1"
Low Level: "0"
3 DATA 2
4 DATA 3
5 DATA 4
6 DATA 5
7 DATA 6
8 DATA 7
9 DATA 8
10 nAck (PtrClk) FROM PRINTER Signal indicating completion of incoming data.
11 Busy (PtrBusy) FROM PRINTER Indicates whether the printer state can accept
data or not.Data cannot be accepted during High
Level.
12 PError (AckDataReq) FROM PRINTER Paper error takes place during High Level.
13 Select (Xflag) FROM PRINTER Always High Level when the parallel interface is
active.
14 nAutoFd (HostBusy) TO PRINTER Used for two-way communications.
15 Unused – Unconnected
16 GND – Ground for signal.
17 FG – Ground for chassis.
18 +5V FROM PRINTER Provides +5V. Cannot supply power to an
external device.
19 to
30
GND – Ground for signal.
31 nInit (nInit) TO PRINTER Printer is initialized during Low Level.
32 nFault (nDataAvail) FROM PRINTER When printer is alarming the printer goes to Low
Level state.
33 GND – The ground for signals
34 Unused – Un-connecting.
35 HILEVEL FROM PRINTER 3.3kW inside printer is pulled up by +5V.
36 nSelectIn
(IEEE1284 active)
TO PRINTER Used for two-way communications. Always in
Low Level in the compatible mode.